The Iron Magus
I prefer it when they use it for good, or at least for awesome. But I've liked Sen since her most evil beginnings... I really had to force myself to side with Overseer.
gonk It was all for roleplay reasons. The sacrifices I make for my art...
emo
I have to admit, I'm usually drawn towards the darker sides, even before I started roleplaying Sentinel a few years ago. I roleplay the Overseer as well and a few other NPCs on occasion, but Sentinel's always my absolute favorite. I love the way her character's been developing in the manga.